<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
    <h1>修改商品页面</h1>
    <input type="text" placeholder="id" v-model="p.id" readonly>
    <input type="text" placeholder="标题" v-model="p.title" >
    <input type="text" placeholder="价格" v-model="p.price" >
    <input type="text" placeholder="数量" v-model="p.num" >
    <input type="button" value="修改" @click="update()">

</div>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.staticfile.org/vue/2.6.14/vue.min.js"></script>
<script>
  let v = new Vue({
    el:"body>div",
    data:{
 p:{id:"",title:"",price:"",num:""}
    },
    methods:{
       update(){
           //发出异步post请求
           axios.post("/update",v.p).then(function () {
               location.href="/list.html";
           })
       }

    },
      created:function () {
          //发出异步的get请求 location.search得到的是地址栏中的参数 ?id=xxx
        axios.get("/select"+location.search).then(function (response) {
              v.p=response.data;
          })

          }

  })
</script>

</body>
</html>